Halsey-Evans-Relocation of operations

Relocation, what are the advantages of relocating a company? What are the disadvantages? Who will benefit from relocation and who will be harmed? What factors are to be considered when thinking about moving a company? What about production operations, marketing and distribution, human resources, stakeholder groups, a unionized workforce and even local and state governments? In the Halsey-Evans case, is relocation the answer?